Written in Go and compiled to WebAssembly, using only the standard library. A goroutine reads the event stream and sends each change on a channel; the render loop receives and updates the page through syscall/js. The dots and numbers at the bottom are the real Go runtime in this tab.
The Go gopher was designed by Renee French (CC BY 4.0). Go fonts by Bigelow and Holmes (BSD licence). Icons: Tabler (MIT).
Keys: j and k or the arrows move between cards; h and l or Shift with an arrow send a card; r renames; x, Delete or Backspace deletes.